Bag



Fei?. 1s, 1941.

J. N. TOOKER BAG Filed March 11, 1938 M l l ORNEYS INVENTOR John TO0/fer' Patented Feb. `18, 1941 N UNITED STATES PATENT OFFICE f BAG Jahn N. Tooker, Canajoharie, N. Y., assi/gnor, by

mesne assignments,

t Arkel] & Smiths,

Canaioliarie, N. Y., a corporation of New York Application March 11, 1938, Serial No. 195,226

2 claims. (o1. 229-55) The present invention relates to multi-ply paper bags that are particularly adapted for packaging cement and other weighty material, and further relates to a method of making such bags.

The object of the invention is to provide a novel and improved bag and method of this character. The invention is illustrated by way of example in the accompanying drawing, in which:

Figure 1 isa plan view ot two paper strips from Figs. 6 and 7 are sectional views on an enlarged scale taken on the lines 6 6 and i--l of Fig. 5.

My improved bag as illustrated in the drawing l is of the type of the ones described and claimed in Letters Patent to Bartlett Arkell, No. 1,805,067, dated May 12, 1931, and John N. Tooker, No. 1,933,776, dated November 7, 1933.

As shown, instead of the bag tube being made of a Vsingle strip of paper as in the case of the bag tubes illustrated in said patents, it is made of two or more strips of paper 2 and 4, the strip 2 being preferably narrower than the strip 4.

The strips 2 and 4 may be of equal length and cut from separate supply strips 3 and E, and the two -strips broughttogether in superposed relation with the forward end 6. of the narrower strip 2 spaced a distance beyond the forward end of the wider strip, and the rear end of the narrower strip spaced a distance forwardly from the rear end oi the wider strip. When the strips are brought together the longitudinal edges of the narrower strip 2 are spaced a distance inwardly from the longitudinal edges of the Wider strip 4.

Previously to positioning the strips together and preferably before the cutting off of the strips, adhesive 8 is applied to one of the strips so that when the two strips are brought together the longitudinal margins and the rear end oi the narrower strip are secured to the wider strip and the forward end 4of the wider strip is secured to the narrower strip.

- The two strips are wound upon themselves on a suitable cylindrical mandrel with the narrower strip 2 on the inside and the projecting end 6 of the narrower kstrip innermost. The strips may be brought together as above described at the point where the'strips start to wind on the mandrel or previously to the winding.

`In the bag tube illustrated in the drawing, the two strips are wound slightly more than twice around the mandrel so as to make a four-ply tube, 5

but the number of plies may be varied as desired. By thus winding the composite strip, the outer end 1 '(l'ig.` 2) of the narrower strip extends a distanceover the inner end 6 of the narrower ,strip and the outer end 9 of the wider strip ex- 10 tends a distance over the inner end Il of the wider strip, thus insuring at least four plies all around the bag tube. The projecting end of the narrower strip 6 is at least the length of one half of a convolution, and the projecting end of the wider strip is also preferably atleast the length of one half of a convolution.

Previously to the winding operation adhesive is suitably applied so that the inner end of the narrower strip is adhesively secured to the overlying ply or convolution and the outer end of the narrower strip is adhesively secured to the overlying ply or convolution, `and the inner end of the wider strip is adhesively secured to the overlying convolution and the outer end of the wider strip is adhesively secured to the underlying convolution.

When the two ,strips are thus wound, the resulting tube is flattened preferably on the line A-A shown in Fig. 2 so as to space the secured 30 ends of the strips from the lines of creasing.

When the tube has thus been ywound and attened the ends thereof lare preferably closed by forming a pasted or satchel end by means of the usual ending` machine. Y

In Fig. 4 the end of the tube is shown spread and flattened and adhesive applied to the side flaps i0 and end flaps or tucks I2, the adhesive in this figure being shown omitted from one, of the whereby, when the two side flaps are brought together, the margins of both the wider and narrower strip of the outer flap are secured to the outer "ply of the under flap. It will also be noted by reference to Figs. 6 and 7 that in the case of the end flaps the plies that are made up of the wider strip project a distance inwardly beyond the plies that are made up of the narrower strip. This construction makes a secureA end closure and the shingled effect eliminates several layers of paper and the paste necessary to fasten them together,

thereby making the ends more exible. Consequently the finished bag when filled with material assumes more readily a rounded shape at the ends, thus obviating the danger of the flaps peeling open from pressure when the illled bags are piled up. The offset or shingling effect at the ends being all aroundthe bag, gives a more fiexible end to the inner extremity of the valve flap, thus creat' ing an easier and tighter closing effect of the valve.

It will also be apparent that by using two or more strips of paper as described, it is possible to much more quickly wind the tube than is possible with the use of a single strip. 'Ihis two-stripv arrangement also allows the use ofstrips of paper of different weight bases, thus allowing a heavier sheet on the outside of the finished bag where the strength is most needed.

As will be evident to those skilled in the art, my invention permits various modifiications without departing from the spirit thereof or the scope of the appended. claims.

What I claim is: i

l. A multi-ply paper bag tube comprising a composite strip made up of two strips of different widths,`the narrower strip having its longitudinal edges spaced inwardly from the adjacent edges of the wider strip and having one end projecting a distance beyond the adjacent end of the wider strip, the composite strip being wound in the direction of its length into'a tube with the narrower strip forming the inner ply of the com- .end formed thereon. with portions of both strips of one of the side aps of the satohel end adhesively secured over the underlying side flap,

said tube comprising at least two complete 4convolutions of said composite strip, and said projecting end of the narrower strip being at least the length of one-half of a convolution.

2. A multi-ply paper bag tube comprising a composite strip made up of two strips of different widths, the narrower strip having its longitudinal edges spaced inwardly from the adjacent edges of the wider strip, the narrower strip having one end projecting a distance beyond the adjacent end of the wider strip and the wider strip having its other end projecting a distance beyond the end of the narrower strip, the composite strip being wound in the direction lof its length into a tube with the narrower strip forming the inner ply of the composite strip and said projecting end innermost, at least one end of thevtube having a pasted Satchel end formed thereon with portions of both strips of one of the side flaps of the satchel end adhesively secured over the underlying side flap, said tube comprising at least two complete convolutions of said composite strip, and said projecting end of each strip being at least the length of one-half of a convolution.

J OHN N. TOOKER. 

